Shoe cementing press with controlled press points



May 12, 1942.

vA. WALTHER SHOE CEMENTING PRESS WITH CONTROLLED PRESS POINTS Filed Jan. 16, 1941 2 Sheefis-Sheet l y 1942- A. WALTHER v 2,283,111

' SHOE CEMENTING PRESS WITH CONTROLLED PRESS POINTS Filed Jan. 1 6 1941 5 2 Sheets-Sheet 2 5 30 S 4 o w 77 2/ -P 2o 25 M o 24 H6. 4. v 0

0 //\/I/E/VT0I L 4061/57 W44 m f fi Patented May 12, 1942 SHOE CEMENTING PRESS WI'lH CON- TROLLED PRESS POINTS August Walther, Frankfort-on-the-Main,

' Germany Application January 16, 1941, Serial No. 374,725 In Germany April 26, 1940 6 Claims.

This invention relates to shoe cementing presses with press members or units on supports revolving with chains or wheels or mounted on tables and having press cushions or press pads which are only connected with the press member.

at their underface or surrounded on all sides by the press member.

In the manufacture of boots and shoes, it is important that after cementing the sole lies as flat on as possible in its fore-part, whereas it should be rounded as much as possible from the ankle-joint up to the heel part.

With the known press cushions with loose press pads, fiat fore-parts are only efie'cted by means of difficult insertions in the press-cover, whereas in the case of press cushions with round fixed press pads the forming of the vaulted ankle-joint is rather difficult.

The object of this invention eliminatesthese disadvantages by that the press pad is only supported about its fore-part, whereas its middle and heel parts are arranged in a freely movable manner, the press member Support, receiving quite a new form.

This invention relates first'of all to a press member arrangement whose press cushion consists of a press pad (rubber bladder), a sleeve, and a press cover having at its fore-part a tightening collar engaging laterally into a groove up to the ankle-joint. From the ankle-joint on, this press cover is not longer supported so that the sleeve with the bladder may expand freely and cling to the vaulted press member bed. The pad shaped sleeve surrounds the bladder preventing an excessive swelling of it, whereas it permits a simultaneous expansion into the desired rounding of the sole in the ankle-joint.

Further, this invention relates also to the controlling means of the presser-lever and 0f the air inlet and outlet to and from the bladder in connection with the new press device. Presserlever controlling devices controlled by rods or by stops arranged behind the pivot fulcrum of the presser-lever are well known, also locking means fixing the pressure lever in its working position. The control gear and locking means have even been arranged jointly on the rear arm of the presser-lever. However, all these arrangements require a variety of details to be installed making the machine complicated in its construction, and delicate. 7

With respect to this invention, all these detriments are eliminated by that only one additional control member is arranged on the press frame independently from the presser-lever, simultaneously forming a locking device and periodically influenced by the various control gear members, so that the operation and locking of the 'presserlever is effected by this single member.

The invention relates further to the control of the air-inlet and outlet for the rubber bladder working necessarily in conformity with the con In the annexed drawings, examples of the details of this invention are illustrated as follows:

Figs. 1-3 show the new construction of a sinle press member, partly in section, in different controlling positions. I

Fig. 1a is a section along the line A-A of Fig. 1. v

Fig. 4 is a part view of a wheel type cementing 2 press with some press members and their conparts acframe with press bed, rubber bladder, and double-arm presser-lever controlled at its rear end.

The new arrangement provides for a flat shaped support or plate member 2, 2a; Fig- 1, overhanging to the front of the frame I fixed on wheel 30, Fig. 4. On the plate-member lies the press pad comprising the rubber bladder 3, a bag-like sleeve 4, and a press cover 5 (Fig. 1a). The press cover 5 has a collar 6 at its inner end, guided along a groove of the press frame cover I nearly half round about the support 2, outside of the rim of the sole, and thus it is gripped fast up to the ankle-joint of the shoe, at 8. From this point, the press cover is not gripped at its sides further more so that although it presses the sole flat on at the toe part of the shoe, it clings on in the ankle-joint portion following the vaulted shape of the sole. This clingingeifect is aided by the bag like sleeve 4 surrounding that part of the rubber bladder 3 not enclosed in the press frame. Thus an excessive swelling and troubles are prevented on the one hand, whereas the bladder can adapt itself to the form of the shoe bottom in an excellent manner, so that from the ankle-joint portion the 'de sired vault-shaped pressing is effected. The bladder and sleeve are so arranged that the compressed air is admitted through the rest plate 2. This inlet contains the controlled air valve l9.

On the press member frame is pivoted the well-known double-arm presser-lever 9, l bearing a roller H on its rear arm l0. Hitherto, in

the case of shoe cementing presses of this kind, difierent and separate control parts have been arranged for lowering, locking and releasing respectively, in other cases arranged also side by side on the rear arm lfl of the presser-lever. This invention eliminates the varieti of parts and removes from their location above the lever there impeding the accessibility by providing one single and simple control part l2 only behind or below the rear lever-end II. This is a considerable simplification of the whole control gear, results in a better accessibility to the space behind, and greater safety in the operation of the machine. This control part [2 comprises a simple cam disk with different curves cooperating with movable or fixed control members.

Figs. 1-3 represent the different positions of the presser-lever controlling device.

Below thecam roller H of the rear arm of the presser lever a cam disk I2 is pivoted at IE to the press frame I. The disk l2 comprises the cam-curve [2a cooperating with the known control members I3, M, the curve i217, and the notches [20 for the engagement of the roller I I of the presser-lever arm l0, and the curve lZd cooperating with the guider or deflector I6 arranged turnable on the wheel pillar l and springactuated by the spring 43, Fig. 4.

Fig. 1 shows the press member at the start of the working operation with the presser-lever 9 in released and raised position. The rear arm I0 rests with its roller II on the curves 12b and I20, as it is actuated by the spring l8. The movable control member l3 with the guide roller 14 is guided in a bushing fixed on the machine and, therefore, serves to control all revolving press members provided on the wheel. If the control member I3, Fig. 2, rises and one press member comes in the working position, the roller 14 acts the curve I2a and turns the cam l2 so that the roller l l of the arm I0 is forced to run over curve i222 and rises together with the arm 10, whereas the presser-lever 9 is lowered onto the shoe, pressing it tight against the press cushion 3, 4, 5. In the meantime, roller ll reaches one of the notches I2c and thereby locking the lever in the pressing position. Now, valve [9 is opened and compressed air flows into the air cushion in order to press the sole to be cemented tight onto the shoe. This pressing position remains-even though the control member I3 is lowered-in order to be ready for the next press member, Fig. 3.

In case the shoe with the cemented sole has to be taken out of the press frame, the air mustas usuallybe discharged out of the press cushion releasing the counterpressure against the presser-lever. A description of this controlling device will be given below.

-The air has been discharged, the control cam l2 contacts the deflector l6 pivoted at IT on the wheel pillar and drawn downwards by the action of the spring 43. Then,the curve l2d meeting with the guider I6, is pressed down, and the cam I2 is turned back so that the roller II travels from the notches I on to the curve l2h, and arm ID is lowered under the action of the spring l8. Thereby, the presser-lever 9 is raised and releases the shoe; thus, the starting position has been. restored.

In case one or more press members are to be omitted, some members may travel over the releasing points the compressed air being not discharged. Then, the pressure tension remains and also the locking of the presser-lever. Now, if the deflector or guider I6 contacts edge l2d of the cam l2, Fig. 3, the deflector cannot turn the cam I2 and must move itself against the spring 43; behind the cam edge the deflector returns into its former position. For this, spring 43 is made only of such a force that it may turn certainly the released cam H, but not the cam locked under the air-pressure in the cushion.

The control for the compressed air regulation is timed with the locking means of the presserlever.

Among the known cementing presses of various form are such where a joint central valve regulates theadmission of the compressed air to the press members altogether. This, however, has the disadvantage that by a trouble occurring in this central valve all of the press members are affected. Other types have separate valves, one at each press member for the inlet and outlet.

This invention eliminates these disadvantages by the provision of a control valve for the compressed air at each press member, but only one control member for all valves together which automatically opens, closes, or looks the valves one after the other.

The regulation for the compressed air necessary for the new construction of the press member according to this invention is illustrated in Figs. 4-6. v

As mentioned above, on the press member bottom 2 supply conduits for the compressed air are provided leading to the swivel valve l9 and equipped with several control stops 2!], 2|, 22. The deflectors or stops 23, 24, 25 co-operating with the before mentioned valve stops are rigid-' ly fixed to the pillar of the machine.

At the position a, Fig. 5, the shoe is still under pressure so that no air can either flow in or out. Valve I9 is locked.

Starting the machine the wheel continues rotating and the stop 29 of the valve strikes against the fixed stop 23 and reversing turns the valve into position 1), whereby opening the outlet and discharging out compressed air of the air cushion. In the meantime, the machine is stopped by the action of the control of the valve drive; then, the finished cemented shoe can be taken out of the press member and a new shoe may be inserted.

I When the machine is started again, the stop 2| strikes against the deflector 24 and, thus, turns the valve into position 0 open so that compressed air can flow into the conduit 44 and the bladder 3. The shoe is put under pressure by the swelled bladder.3.

Now, when the operation is continued, the stop 22 strikes against the deflector 25, Fig. 5, and turns the valve l9 back into positon d corresponding to position a. Thereby, compressed air cannot pass, as the valve is locked; it remains locked so long until at position a the deflector 23 is again actuated.

If it is desired to have the stops of valve l9 passed by the deflectors 23, 24, 25 for instance in order to let some shoes somewhat longer under pressure, then, the carrier 46 of the defiectors 23 and 24 has to be moved on the guide bar 45, Fig. 6. Now, the stops are passing the removed deflectors in an uninfluenced manner.

What I claim is:

1. The combination with a shoe cementing press having controlled revolving press members with an air pressed cushion, of a press cushion sup-- port or bed forming a flat tub shaped bed at the toe and a freely projecting plate at the anklejoint and heel part of the shoe, the press cushion on the support cooperating with a usual doublearmed presser-lever, controlled at the rear lever arm by a controlling device pivoted to the press cushion support and arranged between a known driving-member and the rear lever-arm.

2. The combination with a shoe cementing press having controlled revolving press members with an air pressed cushion, of a press cushion support or bed forming a fiat tub shaped bed at the toe and a freely projecting plate at the anklejoint and heel part of the shoe, the cushion bed comprising on the rim of the tub a side-guide enclosing the space on the toe surrounding the cushion till the ankle-joint and adapted to engage with the rim of the press-cover above the cushion, and a freely projecting plate curved in accordance with the last form and having free edges leaving the cushion freely accessible towards the toe and the side portions.

3. The combination with a shoe cementing press having controlled revolving press members with an air pressed cushion, of a press cushion support or bed forming a flat tub shaped bed at the toe and a freely projecting plate at the ankle-joint and heel part of the shoe, the cushion bed comprising on the rim of the tub a sideguide enclosing the space on the toe surrounding the cushion till the ankle-joint and adapted to engage with the rim of the press-cover above the cushion, the press-cover being provided with a guiding-collar engaging in the side-guide of the tub part of the bed.

4. The combination with a shoe cementing press having controlled revolving press members with an air pressed cushion, of a press cushion support or bed forming a fiat tub shaped bed at the toe and a freely projecting plate at the ankle-joint and heel part of the shoe, the press cushion on the support cooperating with a usual double-armed presser-lever, controlled at the rear lever arm by a controlling device pivoted to the press cushion support and arranged between a known driving member and the rear lever-arm, the controlling device having the form of an eccentrically pivoted cam-disk provided with a number of curves for the raising, locking and lowering of the presserlever.

5. The combination with a shoe cementing press having controlled revolving press members with an air pressed cushion, of a press cushion sup port or bed forming a flat tub shaped bed at the toe and a freely projecting plate at the ankle-joint and heel part of the shoe, the press cushion on the support cooperating with a usual doublearmed presser-lever, controlled at the rear lever arm by a controlling device pivoted to the press cushion support and arranged between a known driving member andthe rear lever-arm, the controlling device having the form of an eccentrically pivoted cam-disk provided with a number of curves for the raising, locking and lowering the presser-lever, the curves for raising and lowering the presser-lever and for turning the cam lever arm by a controlling device pivoted to the press cushion support and arranged between a known driving member and the rear lever-arm, the controlling device having the form of an eccentrically pivoted cam-disk provided with a number of curves for the raising, locking and lowering of the presser-lever, the cam-disk 'cooperating with a spring-actuated deflector fixed to the press frame and provided with a cam path engaging with a curve on the cam-disk.

AUGUST WALTHER. 

